3-in-1 Record Clamp Audio LP Disc Stabilizer Stroboscope Gradienter Turntable HiFi 9.9oz Vinyl Clamp Net Weight: 281g/9.9oz. Not very heavy but sturdy enough to couple the record securely to your platter. Size: 35mm(H) x 77mm(D); Hole diameter:7mm, sits securely over the turntable spindle. Material: high quality Aluminum. A quality solid machined aluminum block weight for turntable For eliminating vibration, stabilizing rotational speed, maintaining horizontal level of LP Turntable Package: 1* Vinyl Record Clamp